
#!/usr/bin/python3
# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import atheris
import sys
with atheris.instrument_imports():
    from openpyxl.formula.tokenizer import *
    from openpyxl.formula.translate import *

def TestInput(data):
    fdp = atheris.FuzzedDataProvider(data)

    try:
        #Initial tokenizer for random string and process it
        Tokenizer(fdp.ConsumeString(200))

        #Translate random string formulae
        Translator(fdp.ConsumeString(200), origin="A1").translate_formula("B2")
    except IndexError as e:
        if 'empty list' not in str(e):
            raise e
    except (TokenizerError, TranslatorError):
        # Internal error handling is expected
        pass

def main():
    atheris.Setup(sys.argv, TestInput, enable_python_coverage=True)
    atheris.Fuzz()

if __name__ == "__main__":
    main()
